Thermo king reefer codes

#1
Hope any one here can help, i have a 2005 thermo king smart reefer and I just got a couple of codes earlier today, first that yellow K in the rear view mirror display came on, I checked the codes and it gave me "check refrigeration capacity" I cleared it and it hasnt come back on, also I got code 33 check engine rpm, cleared that one also and it hasnt come back on either, I called for service but no one can check my unit until Tuesday, I am in Topeka KS, can any one tell me if it is safe to get a load to get out of here? any advise would be greatly appreciated